Novel resonance tube device based on standing wave waveform measurement

Abstract

The utility model discloses a novel resonance tube device based on standing wave waveform measurement, which comprises a supporting mechanism, a resonance pipeline, a moving plate, a sound sensor, a sound source and an air column adjusting mechanism, and is characterized in that the supporting mechanism comprises side plates and supporting legs; through mounting holes are formed in the left side wall and the right side wall of each side plate; the upper parts of the supporting legs are respectively connected with the side plates; the two sides of the resonance pipeline are fixedly connected with the mounting holes of the side plates respectively, and a channel is formed in the bottom of the resonance pipeline; the moving plate is horizontally and movably arranged in the channel of the resonance pipeline, and a connecting hole is formed in the middle; the sound sensor is vertically arranged, and a microphone of the sound sensor is connected with the connecting hole of the movable plate; the sound source is arranged in the right end of the resonance pipeline; the air column adjusting mechanism is arranged on the left side of the supporting mechanism and movably connected with the interior of the resonance pipeline. According to the utility model, the standing wave in the resonance tube can be measured, the sound velocity measurement experiment is assisted, and the demonstration and measurement effects of the experiment are improved. The device is simple in structure and accurate in measured data.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of experimental apparatus, especially, relate to a novel resonance tube device based on standing wave waveform measurement. BACKGROUND

[0002] Sound wave is a kind of mechanical wave propagating in elastic medium, and sound velocity is a physical quantity describing the speed of sound wave propagation in medium, resonance method measurement sound velocity experiment utilizes the phenomenon of sound wave interference to form standing wave, contains the important physical concept of wave interference, and is the important content in physics experiment classroom. Ultrasonic wave is usually used to measure sound velocity in physics laboratory, but ultrasonic experimental instrument is generally expensive, and experimental phenomenon is difficult to intuitively perceive.

[0003] The resonance tube experiment using audible sound wave is one of the most basic sound wave resonance experiments, which has the advantages of intuitive and obvious experimental phenomenon, relatively simple experimental operation and rich experimental connotation. In the traditional resonance tube experiment, resonance point is adjusted by changing the frequency of sound source or the length of tube, and then the corresponding air column length or sound source frequency is recorded to calculate the sound velocity. This process cannot vividly and effectively explain the physical law of resonance tube resonance, and is not conducive to beginners to learn the knowledge of sound wave interference since the standing wave waveform in the tube is not measured. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing a novel resonance tube device based on standing wave waveform measurement to solve the technical problems in the background.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A novel resonance tube device based on standing wave waveform measurement, comprising a supporting mechanism, a resonance tube, a moving plate, a sound sensor, a sound source and an air column adjusting mechanism, wherein the supporting mechanism comprises side plates and supporting legs; the side plates are provided with two, which are respectively arranged at intervals left and right, and the side walls left and right of the side plates are provided with through mounting holes; the supporting legs are provided with multiple, and the upper parts thereof are connected with the side plates respectively, and the lower parts thereof extend downward; the resonance tube is arranged horizontally left and right, and the left and right sides thereof are fixedly connected with the mounting holes of the two side plates respectively, and the bottom of the resonance tube is provided with a channel along the left and right directions; the moving plate is movably arranged in the channel of the resonance tube horizontally left and right, and the two ends thereof extend left and right, and the middle part thereof is provided with a connecting hole, and the moving plate can move left and right in the resonance tube; the sound sensor is arranged vertically, and the microphone thereof is connected with the connecting hole of the moving plate; the sound source is arranged in the right end of the resonance tube; and the air column adjusting mechanism is arranged on the left side of the supporting mechanism and movably connected with the inside of the resonance tube.

[0007] Further, the side plates are U-shaped plate structures with opposite openings; and the supporting legs are angle plate structures with inner right angles fixedly connected with the outer right angles of the side plates.

[0008] Further, the support block is arranged on the opposite side of the two side plates and below the resonance tube, and the top surface of the support block is in contact with the bottom surface of the resonance tube.

[0009] Further, the rib is arranged horizontally and is spaced apart front and back by two, and the two ends are fixedly connected to the upper part of the opposite side of the two side plates.

[0010] Further, the air column adjusting mechanism comprises a transmission assembly and a baffle, the transmission assembly comprises a hand-operated push rod and a transmission rod, the hand-operated push rod is arranged on the left side of the support mechanism, the transmission rod is arranged horizontally, and the left end of the transmission rod is fixedly connected to the right end surface of the push rod of the hand-operated push rod, and the baffle is arranged vertically, and the left end surface of the baffle is fixedly connected to the right end of the transmission rod, and the transmission assembly can drive the baffle to move in the resonance tube.

[0011] Further, the sealing layer is arranged on the outer surface of the sealing layer.

[0012] Further, the smooth layer is arranged on the outer surface of the sealing layer.

[0013] Further, the pushing mechanism comprises an electric push rod, and the electric push rod is arranged on the right side of the support mechanism, and the left end of the push rod of the electric push rod is in contact with the right end of the moving plate.

[0014] Further, the top surface of the resonance tube is provided with a scale line.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model can realize the measurement of the standing wave in the resonance tube, assist the performance of the sound velocity measurement experiment, improve the demonstration and measurement effect of the experiment, and has simple structure and accurate measurement data.

[0017] 2. The utility model discloses a resonance tube, and a movable moving plate is arranged in the resonance tube, the moving plate is moved, and the sound sensor on the moving plate is moved, so that the standing wave in the resonance tube can be measured in all directions, and the utility model has the advantages of convenient use, accurate measurement and intuitive display of experimental data and results.

[0018] 3. In the support mechanism of the utility model, the side plate of the U-shaped structure, the support leg of the angle plate structure, the rib plate and the support block can stably support the resonance tube.

[0019] 4. The utility model discloses a pushing mechanism, and an electric push rod can stably and uniformly push the moving plate and the sound sensor to move, so that the accuracy and precision of the standing wave waveform measurement are ensured.

[0020] 5. The utility model discloses a air column adjusting mechanism is set up, through the baffle closes the resonance duct, and can change the position of baffle in resonance duct through transmission assembly, adjust the length of air column in resonance duct, simultaneously, transmission assembly can also fine adjustment to baffle, further guarantee the precision of experiment.

[0021] 6. The utility model discloses a transmission in the device is equipped with sealing layer and smooth layer on transmission rod, and sealing layer makes transmission rod push baffle move in resonance duct, guarantees the sealing property in resonance pipe, and smooth layer can reduce the friction of sealing layer and reduce the noise, guarantee the accuracy of experiment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structure schematic drawing of the utility model;

[0023] Figure 2 It is the structure schematic drawing of the utility model support mechanism;

[0024] Figure 3 It is the structure schematic drawing of the utility model resonance duct;

[0025] Figure 4 It is the connection structure schematic drawing of the utility model resonance duct and moving plate;

[0026] Figure 5 It is another visual angle connection structure schematic drawing of the utility model resonance duct and moving plate;

[0027] Figure 6 It is the connection structure schematic drawing of the utility model moving plate and sound sensor;

[0028] Figure 7 It is the structure schematic drawing of the utility model air column adjusting mechanism;

[0029] Figure 8 It is the enlarged view of A of the utility model;

[0030] In the drawing, 1-support mechanism;11-side plate;111-mounting hole;12-support leg;13-counterweight;14-support block;15-rib;

[0031] 2-resonance duct;21-channel;22-scale line;3-moving plate;31-connection hole;4-sound sensor;5-sound source;

[0032] 6-air column adjusting mechanism;61-transmission assembly;611-hand push rod;612-transmission rod;62-baffle;621-sealing layer;622-smooth layer.

[0033] 7-push mechanism;71-electric push rod. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following preferred embodiments are referred to the drawings and further described in detail. However, it should be pointed out that many details listed in the description are only for the reader to have a thorough understanding of one or more aspects of the utility model, and the aspects of the utility model can be realized without these specific details.

[0035] As shown in Figures 1-8 A new type of resonance tube device based on standing wave form measurement, including support mechanism 1, resonance pipe 2, moving plate 3, sound sensor 4, sound source 5, baffle 62, air column adjusting mechanism 6, the support mechanism 1 includes side plate 11, support leg 12;The side plate 11 is equipped with two, respectively left and right interval arrangement, the side plate 11 left and right side wall is provided with through mounting hole 111;The support leg 12 is equipped with multiple, which are respectively connected with the side plate 11, and the lower part extends downward;The resonance pipe 2 is horizontally arranged, and the left and right sides are respectively fixedly connected with the mounting hole 111 of the two side plates 11, and the two ends extend outward, and the bottom of the resonance pipe 2 is provided with a passage 21 in the left and right directions;Sound waves form standing waves in the resonance pipe 2;The moving plate 3 is movably arranged in the passage 21 of the resonance pipe 2, and the two ends extend out of the two ends of the resonance pipe 2 in the left and right directions, and the middle part is provided with a connecting hole 31, and the moving plate 3 can move left and right in the resonance pipe 2;The sound sensor 4 is vertically arranged, and the microphone is wound with sponge tape, which is connected with the mounting hole 111 of the moving plate 3 through interference fit;The microphone of the sound sensor 4 is moved in the resonance pipe 2 by moving the moving plate 3, so that the sound sensor 4 traverses all positions in the resonance pipe 2 and measures all positions in the resonance pipe 2;The sound sensor 4 can be connected with the computer, and the data of the sound wave can be obtained through the computer;The sound source 5 is arranged in the right end of the resonance pipe 2;The sound source 5 is a cylindrical speaker for emitting sound waves, and the size diameter is smaller than the resonance pipe 2, and the outer surface of the speaker is attached to the inner side wall of the resonance pipe 2 by using EVA sponge tape, so that the speaker can be installed in the resonance pipe 2, and at the same time, the gap between the lower part of the speaker and the resonance pipe 2 is left, which prevents the movement interference between the sound source 5 and the moving plate 3;The air column adjusting mechanism 6 is arranged on the left side of the support mechanism 1 and movably connected with the inside of the resonance pipe 2, and the air column adjusting mechanism 6 is used for adjusting the length of the air column in the resonance pipe 2.

[0036] The side plate 11 is a U-shaped plate structure, and the opening is opposite;The support leg 12 is an angle plate structure, and the inner right angle edge is fixedly connected with the outer right angle edge of the side plate 11, and the inner right angle edge of the lower part of the support leg 12 is provided with a counterweight 13;The U-shaped structure, the side plate 11 and the angle plate structure of the support leg 12 can ensure the stability of the device.

[0037] It also comprises support blocks 14; the support blocks 14 are respectively arranged on the opposite sides of the two side plates 11 and are located below the resonance duct 2, the top surface of the support blocks 14 is in contact with the bottom surface of the resonance duct 2; the support blocks 14 can disperse the stress borne by the device and improve the strength and stability of the structure.

[0038] It also comprises ribs 15; the ribs 15 are horizontally arranged and are spaced apart front and back by two, the two ends of the ribs 15 are respectively fixedly connected to the upper parts of the opposite sides of the two side plates 11; the ribs 15 connect the two side plates 11, further improving the stability of the device.

[0039] The air column adjusting mechanism 6 comprises a transmission assembly 61 and a baffle 62; the transmission assembly 61 comprises a hand-operated push rod 611 and a transmission rod 612; the hand-operated push rod 611 is arranged on the left side of the support mechanism 1; the transmission rod 612 is horizontally arranged, the left end of the transmission rod 612 is fixedly connected to the right end surface of the push rod of the hand-operated push rod 611; the baffle 62 is vertically arranged, the left end surface of the baffle 62 is fixedly connected to the right end of the transmission rod 612; the transmission assembly 61 can drive the baffle 62 to move in the resonance duct 2, the bottom of the baffle 62 has a gap with the inner wall of the resonance duct 2, preventing the baffle 62 from interfering with the movement of the moving plate 3 when the baffle 62 moves; the push rod of the hand-operated push rod 611 is elongated, pushing the baffle 62 to move, adjusting the position of the baffle 62 in the resonance duct 2, thereby adjusting the length of the air column of the resonance duct 2; the hand-operated push rod 611 is a lead screw push rod, which can precisely adjust the position of the baffle 62. When in use, a mounting table with a suitable height can be placed under the hand-operated push rod 611, and the hand-operated push rod 611 is fixed on the mounting table, so that the hand-operated push rod 611 can stably operate.

[0040] It also comprises a sealing layer 621; the sealing layer 621 is sleeved on the upper part of the circumferential side wall of the baffle 62. The sealing layer 621 is sponge, by arranging the sponge sealing layer 621, the upper part of the circumferential side wall of the baffle 62 and the resonance duct 2 can be sealed.

[0041] It also comprises a smooth layer 622; the smooth layer 622 is arranged on the outer surface of the sealing layer 621, the smooth layer 622 is formed by winding a PVC tape on the sealing layer 621, which can reduce the friction of the sealing layer 621, reduce the moving noise and reduce the influence on the experiment.

[0042] The top surface of the resonance duct 2 is provided with a scale line 22, the scale line 22 is used for recording and reading the position of the baffle 62, thereby determining the length of the air column in the resonance duct 2.

[0043] It also includes a pushing mechanism 7; the pushing mechanism 7 includes an electric push rod 71; the electric push rod 71 is arranged on the right side of the supporting mechanism 1, and the left end of the push rod can be in contact with the right end of the moving plate 3.

[0044] The working mode of the utility model is:

[0045] I. verification experiment of resonance formula and resonance law

[0046] The resonance formula of the resonance pipe is:

[0047]

[0048] The relationship between lambda and sound velocity is:

[0049] u = lambda f

[0050] In the formula, L is the pipe length (air column length), lambda is the wavelength, n is the wave number, f is the frequency, and u is the sound velocity.

[0051] Therefore, by keeping one of the variables unchanged and exploring the relationship between the other two variables, three experiments of L, f and n invariable can be obtained, which can cover all the connotations of the resonance pipe experiment, thereby directly demonstrating the verification experiment of the resonance formula and the resonance law.

[0052] 1. L is invariable

[0053] According to the resonance formula of the resonance pipe and the relationship between lambda and sound velocity, we can get

[0054]

[0055] Adjusting the frequency of the sound source 5 can change the wavelength of the sound wave and reach different resonance points. As can be seen from the formula, the ratio of the sound wave frequencies corresponding to adjacent resonance points is 1:2:3:4:… The essential cause of this physical law is that L is a constant and the sound velocity u is a constant, so the standing wave at different resonance points satisfies f / n constant.

[0056] Because the number of half waves in the pipe n changes according to the law of 1, 2, 3..., the resonance frequency f also changes according to the same law, showing a proportional change phenomenon.

[0057] The operation method of the device for the experiment is:

[0058] S1: Move the baffle 62 to the appropriate position in the resonance tube 2 by the hand push rod 611 and transmission rod 612 in the air column adjusting mechanism 6, to get a certain length of air column length L, move the sound sensor 4 to the vicinity of the sound source 5 by the moving plate 3, and connect the sound sensor 4 with the computer;

[0059] S2: Turn on the sound source 5, and first set the sound frequency to a small frequency, and gradually increase the frequency, and observe the sound sensor 4, when the sound sensor 4 reaches the peak, resonance occurs, and the frequency f is kept and recorded;

[0060] S3: Start the electric push rod 71, move the moving plate 3 at a constant speed, the moving plate 3 drives the sound sensor 4 to move, the sound sensor 4 measures the standing wave form in the resonance tube 2, and the waveform pattern is read by the computer and n is recorded;

[0061] S4: Continue to increase the frequency, repeat the above operation, and record f i , n i ;

[0062] S5: Analyze the data of f i , n i , and verify the law of f / n.

[0063] 2. f is constant

[0064] From the formula, when f is constant, the standing waves at different resonance points satisfy n / L constant, since the number of half waves n is 1, 2, 3, 4…, the measured air column length L is different by a length equal to half the wave length λ / 2, after obtaining λ, the sound speed can be calculated according to the wave speed formula.

[0065] The operation method of the device for the experiment is:

[0066] S1: Move the baffle 62 to the appropriate position in the resonance tube 2 by the hand push rod 611 and transmission rod 612 in the air column adjusting mechanism 6, to get a certain length of air column length L, move the sound sensor 4 to the vicinity of the sound source 5 by the moving plate 3, and connect the sound sensor 4 with the computer;

[0067] S2: Turn on the sound source 5, and keep the frequency f constant, adjust the position of the baffle 6, observe the sound sensor 4, until the sound sensor 4 reaches the peak, resonance occurs;

[0068] S3: After resonance occurs, move the moving plate 3 at a constant speed by the electric push rod 71, the moving plate 3 drives the sound sensor 4 to move, the sound sensor 4 measures the standing wave form in the resonance tube 2;

[0069] S4: The time point corresponding to the standing wave antinode is read by the computer, the antinode position is calculated and recorded, the position of the baffle 6 in the resonance pipe 2 is determined by the scale line 22, that is, the position of the antinode, and the initial measured value of the air column length L is obtained;

[0070] S5: The baffle 6 is adjusted to the first antinode position, the transmission rod 83 is moved by the hand-operated push rod 81 of the transmission device, the baffle 6 is moved within a range of 2 cm in the position by the transmission rod 83, the sound sensor 4 is observed, and the resonance occurs when the sound sensor 4 reaches the peak value, the position of the baffle 6 is recorded by the scale line 22, and the fine measured value of the air column length L is calculated and recorded;

[0071] S6: According to λ and the fine measured value of the air column length L, the sound velocity u can be calculated according to the formula.

[0072] Because the wavelength of audible sound wave is long, the air column length is longer than the ultrasonic experiment used in the current laboratory under the condition of the same number of resonance points, therefore, using ultrasonic wave to find resonance points in a large length range not only leads to complicated experimental operation, but also consumes more time. The advantages of wave shape measurement of the device can be used to measure the standing wave shape at the frequency first, quickly determine the approximate position of each standing wave resonance point, and then finely adjust the position of the baffle by using the fine transmission device, so as to simplify the experimental operation, save the experimental time, and ensure the experimental precision.

[0073] 3. n is constant

[0074] When the resonance pipe is closed at both ends, n represents the number of half waves, when the resonance pipe maintains resonance, the standing wave n=n0 is constant, and according to the resonance formula, the following can be obtained:

[0075]

[0076] By determining the position of the resonance point of the standing wave at n=n0 corresponding to the frequency f of different sound sources 5, the air column length L is determined, and then the frequency f of the sound source 5 is changed i n0 , the above operation is repeated and L is recorded i , finally, the experimental data is fitted, and the sound velocity u can be calculated. In this experiment, the number of half waves n=5 is kept constant.

[0077] The operation method of the device for the experiment is as follows:

[0078] S1: The hand-operated push rod 611 and the transmission rod 612 in the air column adjusting mechanism 6 are used to move the baffle 62 to a suitable position in the resonance pipe 2, the moving plate 3 is moved, the sound sensor 4 is moved to the vicinity of the sound source 5, and the sound sensor 4 is connected with the computer;

[0079] S2: The sound source 5 is started, and the frequency is set to f 15, adjust the position of the baffle 6, observe the sound sensor 4, until the sound sensor 4 reaches the peak, that is, resonance occurs;

[0080] S3: after resonance, the moving plate 3 is moved at a uniform speed by the electric push rod 71, the sound sensor 4 is moved by the moving plate 3, and the sound sensor 4 measures the standing wave form in the resonance pipe 2;

[0081] S4: the standing wave node corresponding time point is read by the computer, the 5th wave node position is calculated and recorded, the position of the baffle 6 is determined by the scale line 22, that is, the position of the wave node, and the initial value of the air column length L is obtained;

[0082] S5: adjust the baffle 6 to the 5th wave node position recorded in S4, move the transmission rod 83 by the hand-operated push rod 81 of the transmission device, move the baffle 6 within 2cm in the position by the transmission rod 83, observe the sound sensor 4, until the sound sensor 4 reaches the peak, that is, resonance occurs, the position of the baffle 6 is recorded by the scale line 22, and the precise value of the air column length L is obtained and recorded;

[0083] S6: change the frequency of the sound source 5 to f 2 5, f 3 5, f 4 5,..., repeat the above operation and record the corresponding L i , the sound velocity can be calculated by the formula.

[0084] Because the traditional resonance pipe cannot observe the wave form in the pipe and cannot measure n, it is difficult to keep n unchanged. In the traditional resonance pipe experiment, the sound spectrum can be observed by software, but the judgment process is more tedious, and the demonstration effect is not as intuitive as using the device.

[0085] II. Sound velocity measurement

[0086] The device can also use the standing wave measurement method to calculate the sound velocity, that is, read the wave form data after measurement and directly calculate the sound velocity.

[0087] The specific operation method is:

[0088] S1: move the baffle 62 to the appropriate position in the resonance pipe 2 by the hand-operated push rod 611 and the transmission rod 612 in the air column adjusting mechanism 6, obtain the air column length L, move the sound sensor 4 to the vicinity of the sound source 5 by the moving plate 3, and connect the sound sensor 4 with the computer;

[0089] S2: turn on the sound source 5, adjust the frequency of the sound source 5, observe the sound sensor 4, when the sound sensor 4 reaches the peak, that is, resonance occurs, keep and record the frequency f;

[0090] S3: Start the electric push rod 71, move the moving plate 3 at a uniform speed, and move the sound sensor 4. The sound sensor 4 measures the standing wave waveform in the resonance pipe 2;

[0091] S4: Read the time point corresponding to the standing wave node, calculate the standing wave node position and record it, determine the position of the baffle 6 through the scale line 22, and obtain the air column length L;

[0092] S5: Change the frequency of the sound source 5, continue to measure according to the above method, obtain multiple sets of node data, and then calculate the distance between adjacent nodes by difference. Finally, the sound speed u is calculated through the wave speed formula.

[0093] In the traditional resonance pipe experimental device, the sound intensity near the resonance critical point changes slightly, which not only leads to errors in measuring the resonance point, but also makes the experimental process tedious and time-consuming, and the resonance point is difficult to determine. The device directly calculates the sound speed by measuring the standing wave waveform and reading the waveform data, avoiding the errors caused by multiple adjustments of the resonance point, greatly saving the experimental time, and making the experiment more simple.

[0094] III. Half-wave loss verification

[0095] The device can also be used to verify the existence of half-wave loss.

[0096] The specific operation method is as follows:

[0097] S1: Move the baffle 62 to the appropriate position in the resonance pipe 2 through the hand crank push rod 611 and transmission rod 612 in the air column adjusting mechanism 6, obtain the air column length L, move the sound sensor 4 to the vicinity of the sound source 5 through the moving plate 3, and connect the sound sensor 4 with the computer;

[0098] S2: Turn on the sound source 5, adjust the frequency of the sound source 5, observe the sound sensor 4, and when the sound sensor 4 reaches the peak value, it is resonant, keep and record the frequency f;

[0099] S3: Start the electric push rod 71, move the moving plate 3 at a uniform speed, and move the sound sensor 4. The sound sensor 4 measures the standing wave waveform when the resonance pipe 2 is closed at both ends;

[0100] S4: Move the baffle 62 out of the resonance pipe 2 through the hand crank push rod 611 and transmission rod 612 in the air column adjusting mechanism 6, repeat the above operation, and obtain the resonance standing wave waveform when the resonance pipe 2 is open at one end;

[0101] S5: Compare the two waveforms obtained to verify the existence of half-wave loss.

[0102] The existence of half-wave loss is directly displayed through the device and the experiment, which is of great significance for intuitively understanding the concept and role of half-wave loss.

[0103] The above merely describes the preferred embodiments of the present application, and it should be noted that, for those skilled in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application.

Claims

1. A new resonant tube device based on standing wave pattern measurement, comprising a support mechanism, a resonant tube, a moving plate, a sound sensor, a sound source, an air column adjustment mechanism, characterized in that: The support mechanism comprises side plates and support legs; the side plates are provided in two, and are arranged at intervals left and right, and through mounting holes are formed in the left and right side walls of the side plates; the support legs are provided in multiple, and upper portions thereof are connected with the side plates respectively, and lower portions thereof extend downward; the resonance duct is arranged horizontally left and right, and left and right sides thereof are fixedly connected with the connecting holes of the two side plates respectively, and a passage is formed in the bottom of the resonance duct along the left and right direction; the moving plate is movably arranged in the passage of the resonance duct, and extends left and right at two ends thereof, and a connecting hole is arranged in the middle portion of the moving plate, and the moving plate can move left and right in the resonance duct; the sound sensor is arranged vertically, and a microphone thereof is connected with the mounting hole of the moving plate; the sound source is arranged inside the right end of the resonance duct; and the air column adjusting mechanism is arranged on the left side of the support mechanism, and is movably connected with the inside of the resonance duct.

2. A novel resonator device based on standing wave pattern measurement according to claim 1, characterized in that: The side plates are U-shaped plate structures, and the openings thereof are opposite; and the support legs are angle plate structures, and inner right-angle edges thereof are fixedly connected with outer right-angle edges of the side plates.

3. A novel resonator device based on standing wave pattern measurement as claimed in claim 1, wherein: The support mechanism further comprises support blocks; the support blocks are arranged on opposite sides of the two side plates respectively, and are located below the resonance duct, and top surfaces thereof are in contact with bottom surfaces of the resonance duct.

4. A novel resonator device based on standing wave pattern measurement as claimed in claim 1, wherein: The support mechanism further comprises rib strips; the rib strips are arranged horizontally left and right, and are provided in two at intervals front and back, and two ends thereof are fixedly connected with upper portions of opposite sides of the two side plates respectively.

5. A novel resonator device based on standing wave pattern measurement as claimed in claim 1, wherein: The air column adjusting mechanism comprises a transmission assembly and a baffle; the transmission assembly comprises a hand-operated push rod and a transmission rod; the hand-operated push rod is arranged on the left side of the support mechanism; the transmission rod is arranged horizontally left and right, and a left end thereof is fixedly connected with a right end surface of a push rod of the hand-operated push rod; and the baffle is arranged vertically, and a left end surface thereof is fixedly connected with a right end of the transmission rod, and the transmission assembly can drive the baffle to move in the resonance duct.

6. A novel resonator device based on standing wave pattern measurement according to claim 5, characterized in that: The support mechanism further comprises a sealing layer; the sealing layer is sleeved on an upper portion of a circumferential side wall of the baffle.

7. A novel resonator device based on standing wave pattern measurement according to claim 6, characterized in that: The support mechanism further comprises a smooth layer; the smooth layer is arranged on an outer surface of the sealing layer.

8. A novel resonator device based on standing wave pattern measurement as claimed in claim 1, wherein: The support mechanism further comprises a pushing mechanism; the pushing mechanism comprises an electric push rod; the electric push rod is arranged on the right side of the support mechanism, and a left end of a push rod thereof is in contact with a right end of the moving plate.

9. A novel resonator device based on standing wave pattern measurement as claimed in claim 1, wherein: A scale line is arranged on a top surface of the resonance duct.

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